curl --request POST \
  --url https://api.example.com/agents/traces/chat \
  --header 'Content-Type: application/json' \
  --data '
{
  "project_id": "<string>",
  "trace_id": "<string>",
  "include_feedback": false
}
'

{
  "trace_id": "<string>",
  "root_span_name": "<string>",
  "agent_name": "<string>",
  "agent_version": "<string>",
  "provider": "<string>",
  "total_duration_ms": 123,
  "total_cost_usd": 123,
  "messages": [
    {
      "span_id": "<string>",
      "agent_name": "<string>",
      "agent_version": "<string>",
      "started_at": "2023-11-07T05:31:56Z",
      "user_message": {
        "text": "<string>",
        "content_refs": [
          "<string>"
        ]
      },
      "assistant_message": {
        "text": "<string>",
        "model": "<string>",
        "reasoning_content": "<string>",
        "reasoning_tokens": 123,
        "input_tokens": 123,
        "output_tokens": 123,
        "input_cost_usd": 123,
        "output_cost_usd": 123,
        "total_cost_usd": 123,
        "duration_ms": 123,
        "content_refs": [
          "<string>"
        ]
      },
      "tool_call": {
        "tool_name": "<string>",
        "tool_arguments": "<string>",
        "tool_result": "<string>",
        "duration_ms": 123,
        "content_refs": [
          "<string>"
        ]
      },
      "agent_start": {
        "model": "<string>",
        "system_instructions": "<string>",
        "tool_definitions": "<string>"
      },
      "agent_handoff": {},
      "context_compacted": {
        "compaction_summary": "<string>",
        "compaction_items_before": 123,
        "compaction_items_after": 123
      },
      "feedback": [
        {}
      ]
    }
  ],
  "feedback": [
    {}
  ]
}